JavaScript Basics

Now that you can store data, let's learn how to work with it! JavaScript can perform calculations and combine information in useful ways.

Math Operations (just like a calculator!):

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  + Addition:5 + 3 equals 8
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  - Subtraction:10 - 4 equals 6
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  * Multiplication:3 * 4 equals 12
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  / Division:20 / 5 equals 4
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  % Remainder (modulo):10 % 3 equals 1 (10 ÷ 3 = 3 with remainder 1)

Working with Text (Strings):

• •+ Joins strings together (concatenation)

Example: "Hello" + " " + "World" equals "Hello World"

Comparison Operations (asking questions):

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  === Equals:5 === 5 is true
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  !== Not equals:5 !== 3 is true
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  > Greater than:10 > 5 is true
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  < Less than:3 < 7 is true
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  >= Greater than or equal:5 >= 5 is true
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  <= Less than or equal:4 <= 8 is true

These comparisons always give you a boolean (true/false) answer!